It seems a banjo picker died and went to the pearly gates and Saint Peter said:

"A banjo picker, eh?... and bluegrass at that. With a background like that, you'll have to take a special test for admission. The test is to tell me what is God's first name?"

The banjo picker said:"Oh that's easy. God's first name is Andy. We sing it at Sunday school every week:

Andy walks with me
Andy talks with me
Andy tells me I am his own..."

Thanks to Lee Neugent for this joke.